feat: Allow single quoted strings in the output (starting JSON5)

Author: prantlf

Makefile

@@ -0,0 +1,14 @@
+all: check build test
+
+check:
+	v fmt -w .
+	v vet .
+
+build:
+	v yaml2json.v
+
+test:
+	./test.sh
+
+version:
+	npx conventional-changelog-cli -p angular -i CHANGELOG.md -s

README.md

@@ -1,8 +1,8 @@
 # yaml2json
 
-Converts [YAML] input to [JSON] output.
+Converts [YAML] input to [JSON]/[JSON5] output.
 
-Uses [prantlf.json] and [prantlf.yaml].
+Uses [prantlf.json] and [prantlf.yaml]. See also the [jsonlint] tool.
 
 ## Synopsis
 
@@ -21,6 +21,7 @@ Convert a file using standard input and standard output, as condensed as possibl
     Options:
       -o|--output <file>    write the JSON output to a file
       -t|--trailing-commas  insert trailing commas to arrays and objects
+      -s|--single-quotes    format single-quoted instead of double-quoted strings
       -l|--line-break       append a line break to the JSON output
       -p|--pretty           prints the JSON output with line breaks and indented
       -V|--version          prints the version of the executable and exits
@@ -35,7 +36,15 @@ Convert a file using standard input and standard output, as condensed as possibl
     v vet .
     npx conventional-changelog-cli -p angular -i CHANGELOG.md -s
 
+## TODO
+
+This is a work in progress.
+
+* Finish the [JSON5] support.
+
 [prantlf.json]: https://github.com/prantlf/v-json
 [prantlf.yaml]: https://github.com/prantlf/v-yaml
+[jsonlint]: https://github.com/prantlf/v-jsonlint
 [JSON]: https://www.json.org/
+[JSON5]: https://spec.json5.org/
 [YAML]: https://yaml.org/

v.mod

@@ -1,6 +1,6 @@
 Module {
 	name: 'yaml2json'
-	description: 'Converts YAML input to JSON output.'
+	description: 'Converts YAML input to JSON/JSON5 output.'
 	version: '0.0.4'
 	license: 'MIT'
 	dependencies: ['prantlf.cargs', 'prantlf.jany', 'prantlf.json', 'prantlf.yaml']

yaml2json.v

@@ -5,15 +5,16 @@ import prantlf.yaml { parse_file, parse_text }
 
 const version = '0.0.4'
 
-const usage = 'Converts YAML input to JSON output.
+const usage = 'Converts YAML input to JSON/JSON5 output.
 
 Usage: yaml2json [options] [<yaml-file>]
 
-  <yaml-file>         read the YAML input from a file
+  <yaml-file>           read the YAML input from a file
 
 Options:
   -o|--output <file>    write the JSON output to a file
 	-t|--trailing-commas  insert trailing commas to arrays and objects
+	-s|--single-quotes    format single-quoted instead of double-quoted strings
   -l|--line-break       append a line break to the JSON output
   -p|--pretty           prints the JSON output with line breaks and indented
   -V|--version          prints the version of the executable and exits
@@ -29,6 +30,7 @@ struct Opts {
 mut:
 	output          string
 	trailing_commas bool
+	single_quotes   bool
 	line_break      bool
 	pretty          bool
 }
@@ -49,6 +51,7 @@ fn convert() ! {
 	mut dst := stringify(src, StringifyOpts{
 		pretty: opts.pretty
 		trailing_commas: opts.trailing_commas
+		single_quotes: opts.single_quotes
 	})
 	if opts.line_break {
 		dst += '\n'